org.apache.xalan.transformer
Class KeyRefIterator

java.lang.Object
  org.apache.xpath.Expression
      org.apache.xpath.patterns.NodeTest
          org.apache.xpath.axes.PredicatedNodeTest
              org.apache.xpath.axes.LocPathIterator
                  org.apache.xpath.axes.BasicTestIterator
                      org.apache.xpath.axes.ChildTestIterator
                          org.apache.xalan.transformer.KeyRefIterator

All Implemented Interfaces:

java.io.Serializable, java.lang.Cloneable, javax.xml.transform.SourceLocator, DTMIterator, PathComponent, SubContextList, ExpressionNode, XPathVisitable

public class KeyRefIterator
extends ChildTestIterator

This class filters nodes from a key iterator, according to whether or not the use value matches the ref value.

See Also:

Serialized Form

Field Summary

protected java.util.Vector	m_keyDeclarations Vector of Key declarations in the stylesheet.
(package private) DTMIterator	m_keysNodes
protected QName	m_name
protected XMLString	m_ref
(package private) static long	serialVersionUID

Fields inherited from class org.apache.xpath.axes.ChildTestIterator

m_traverser

Fields inherited from class org.apache.xpath.axes.LocPathIterator

m_allowDetach, m_cdtm, m_clones, m_context, m_currentContextNode, m_execContext, m_lastFetched, m_length, m_pos

Fields inherited from class org.apache.xpath.axes.PredicatedNodeTest

m_foundLast, m_lpi, m_predCount, m_proximityPositions

Fields inherited from class org.apache.xpath.patterns.NodeTest

m_whatToShow, SCORE_NODETEST, SCORE_NONE, SCORE_NSWILD, SCORE_OTHER, SCORE_QNAME, SHOW_BYFUNCTION, SUPPORTS_PRE_STRIPPING, WILD

Fields inherited from interface org.apache.xml.dtm.DTMIterator

FILTER_ACCEPT, FILTER_REJECT, FILTER_SKIP

Constructor Summary

KeyRefIterator(QName name, XMLString ref, java.util.Vector keyDecls, DTMIterator ki)
Constructor KeyRefIterator

Method Summary

short	filterNode(int testNode) Test whether a specified node is visible in the logical view of a TreeWalker or NodeIterator.
protected int	getNextNode() Get the next node via getNextXXX.

Methods inherited from class org.apache.xpath.axes.ChildTestIterator

cloneWithReset, detach, getAxis, setRoot

Methods inherited from class org.apache.xpath.axes.BasicTestIterator

nextNode

Methods inherited from class org.apache.xpath.axes.LocPathIterator

allowDetachToRelease, asIterator, asNode, bool, callVisitors, execute, executeCharsToContentHandler, getAnalysisBits, getContext, getCurrentContextNode, getCurrentNode, getCurrentPos, getDTM, getDTMManager, getExpandEntityReferences, getFilter, getFoundLast, getIsTopLevel, getLastPos, getLength, getPrefixResolver, getRoot, getWhatToShow, getXPathContext, incrementCurrentPos, isDocOrdered, isFresh, isMutable, isNodesetExpr, item, previousNode, reset, returnNextNode, runTo, setCurrentContextNode, setCurrentPos, setEnvironment, setIsTopLevel, setItem, setNextPosition, setShouldCacheNodes, size

Methods inherited from class org.apache.xpath.axes.PredicatedNodeTest

acceptNode, callPredicateVisitors, canTraverseOutsideSubtree, clone, countProximityPosition, deepEquals, fixupVariables, getLocPathIterator, getPredicate, getPredicateCount, getPredicateIndex, getProximityPosition, getProximityPosition, getProximityPosition, initPredicateInfo, initProximityPosition, isReverseAxes, nodeToString, resetProximityPositions, setLocPathIterator, setPredicateCount

Methods inherited from class org.apache.xpath.patterns.NodeTest

calcScore, debugWhatToShow, execute, execute, getDefaultScore, getLocalName, getNamespace, getNodeTypeTest, getStaticScore, initNodeTest, initNodeTest, setLocalName, setNamespace, setStaticScore, setWhatToShow

Methods inherited from class org.apache.xpath.Expression

asIteratorRaw, assertion, error, execute, exprAddChild, exprGetChild, exprGetNumChildren, exprGetParent, exprSetParent, getColumnNumber, getExpressionOwner, getLineNumber, getPublicId, getSystemId, isSameClass, isStableNumber, num, warn, xstr

Methods inherited from class java.lang.Object

equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.apache.xml.dtm.DTMIterator

clone

Field Detail

serialVersionUID

static final long serialVersionUID

See Also:

Constant Field Values

m_keysNodes

DTMIterator m_keysNodes

m_ref

protected XMLString m_ref

m_name

protected QName m_name

m_keyDeclarations

protected java.util.Vector m_keyDeclarations

Vector of Key declarations in the stylesheet.

Constructor Detail

KeyRefIterator

public KeyRefIterator(QName name,
                      XMLString ref,
                      java.util.Vector keyDecls,
                      DTMIterator ki)

Constructor KeyRefIterator

Parameters:

ref - Key value to match

ki - The main key iterator used to walk the source tree

Method Detail

getNextNode

protected int getNextNode()

Get the next node via getNextXXX. Bottlenecked for derived class override.

Overrides:

getNextNode in class ChildTestIterator

Returns:

The next node on the axis, or DTM.NULL.

filterNode

public short filterNode(int testNode)

Test whether a specified node is visible in the logical view of a TreeWalker or NodeIterator. This function will be called by the implementation of TreeWalker and NodeIterator; it is not intended to be called directly from user code.

Parameters:

testNode - The node to check to see if it passes the filter or not.

Returns:

a constant to determine whether the node is accepted, rejected, or skipped, as defined above .